{"id":200,"date":"2026-07-01T15:23:52","date_gmt":"2026-07-01T06:23:52","guid":{"rendered":"https:\/\/yorunekomint.com\/?p=200"},"modified":"2026-07-01T20:50:16","modified_gmt":"2026-07-01T11:50:16","slug":"%e3%80%90c%e8%a7%a3%e8%aa%ac%e3%80%91atcoder-beginner-contest-001-b-%e8%a6%96%e7%a8%8b%e3%81%ae%e9%80%9a%e5%a0%b1%e3%80%90%e7%ab%b6%e6%8a%80%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3","status":"publish","type":"post","link":"https:\/\/yorunekomint.com\/?p=200","title":{"rendered":"\u3010C++\u89e3\u8aac\u3011AtCoder Beginner Contest 001-B &#8211; \u8996\u7a0b\u306e\u901a\u5831\u3010\u7af6\u6280\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3011"},"content":{"rendered":"\n<h2 class=\"wp-block-heading jinr-heading d--bold\">\u672c\u65e5\u306e\u554f\u984c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56de\u306fAtCoder Beginner Contest 001\u306e<strong>B\u554f\u984c\u8996\u7a0b\u306e\u901a\u5831<\/strong>\u3092\u89e3\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"\u3010\u7af6\u30d7\u30ed\u3011C++\u306eif\u6587\u3068\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u554f\u984c\u3092\u89e3\u3053\u3046\uff01\u3010AtCoder Beginner Contest 001-B \u2013 \u8996\u7a0b\u306e\u901a\u5831\u3011\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/d6CQQjqLEnk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u203bYouTube\u306b\u89e3\u8aac\u52d5\u753b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u554f\u984c\u6587\u3092\u8981\u7d04\u3059\u308b\u3068\u3001\u8996\u7a0b\uff08\u8089\u773c\u3067\u7269\u4f53\u304c\u306f\u3063\u304d\u308a\u3068\u78ba\u8a8d\u3067\u304d\u308b\u6700\u5927\u306e\u8ddd\u96e2\uff09\u3092\u30e1\u30fc\u30c8\u30eb\u3067\u53d7\u3051\u53d6\u308a\u3001\u4ee5\u4e0b\u306e\u30eb\u30fc\u30eb\u306b\u5f93\u3063\u3066VV\u3068\u3044\u30462\u6841\u306e\u6574\u6570\u306b\u5909\u63db\u3057\u3066\u51fa\u529b\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u308b\u554f\u984c\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list jinr-list\">\n<li><strong>0.1km \u672a\u6e80<\/strong>\uff1aVV\u306e\u5024\u306f <code>00<\/code> \u3068\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong>0.1km \u4ee5\u4e0a 5km \u4ee5\u4e0b<\/strong>\uff1a\u8ddd\u96e2(km)\u309210\u500d\u3057\u305f\u5024\u3068\u3059\u308b\u30021\u6841\u306e\u5834\u5408\u306f\u4e0a\u4f4d\u306b <code>0<\/code> \u3092\u4ed8\u3059\u3002\n<ul class=\"wp-block-list jinr-list\">\n<li>\u4f8b\uff1a2,000m = 2.0km \u2192 VV\u306f <code>20<\/code>\u3002200m = 0.2km \u2192 VV\u306f <code>02<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>6km \u4ee5\u4e0a 30km \u4ee5\u4e0b<\/strong>\uff1a\u8ddd\u96e2(km)\u306b50\u3092\u8db3\u3057\u305f\u5024\u3068\u3059\u308b\u3002\n<ul class=\"wp-block-list jinr-list\">\n<li>\u4f8b\uff1a15,000m = 15km \u2192 VV\u306f <code>65<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>35km \u4ee5\u4e0a 70km \u4ee5\u4e0b<\/strong>\uff1a\u8ddd\u96e2(km)\u304b\u308930\u3092\u5f15\u3044\u30665\u3067\u5272\u3063\u305f\u5f8c\u300180\u3092\u8db3\u3057\u305f\u5024\u3068\u3059\u308b\u3002\n<ul class=\"wp-block-list jinr-list\">\n<li>\u4f8b\uff1a40,000m = 40km \u2192 VV\u306f <code>82<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>70km \u3088\u308a\u5927\u304d\u3044<\/strong>\uff1aVV\u306e\u5024\u306f <code>89<\/code> \u3068\u3059\u308b\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5165\u529b\u306f\u8ddd\u96e2 m\uff080 \u2266 m \u2266 100,000\uff09\u304c1\u884c\u3067\u4e0e\u3048\u3089\u308c\u3001\u8a08\u7b97\u7d50\u679c\u304c\u6574\u6570\u306b\u306a\u3089\u306a\u3044\u5165\u529b\u3084\u3001\u4e0a\u8a18\u7bc4\u56f2\u306b\u5165\u3089\u306a\u3044\u5165\u529b\uff08\u4f8b\uff1a5km\u3088\u308a\u5927\u304d\u304f6km\u672a\u6e80\uff09\u306f\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u203b<a href=\"https:\/\/atcoder.jp\/contests\/abc001\/tasks\/abc001_2\">https:\/\/atcoder.jp\/contests\/abc001\/tasks\/abc001_2<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading jinr-heading d--bold\">\u89e3\u8aac<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u756a\u30aa\u30fc\u30bd\u30c9\u30c3\u30af\u30b9\u306aif\u6587\u3067\u6761\u4ef6\u3092\u5168\u3066\u66f8\u304d\u51fa\u3059\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"aeaa0d7c-9c7d-41a1-b91b-0212dffa4362\"><pre class=\"language-cpp line-numbers\"><code>#include &lt;iostream>\n#include &lt;iomanip>\nusing namespace std;\n\nint main() {\n    int m;\n    cin >> m;\n\n    int vv;\n    if (m &lt; 100) {                 \/\/ 0.1km \u672a\u6e80\n        vv = 0;\n    } else if (m &lt;= 5000) {        \/\/ 0.1km \u4ee5\u4e0a 5km \u4ee5\u4e0b\uff1a km\u00d710 = m\/100\n        vv = m \/ 100;\n    } else if (m &lt;= 30000) {       \/\/ 6km \u4ee5\u4e0a 30km \u4ee5\u4e0b\uff1a km+50\n        vv = m \/ 1000 + 50;\n    } else if (m &lt;= 70000) {       \/\/ 35km \u4ee5\u4e0a 70km \u4ee5\u4e0b\uff1a (km-30)\/5+80\n        vv = (m \/ 1000 - 30) \/ 5 + 80;\n    } else {                       \/\/ 70km \u3088\u308a\u5927\u304d\u3044\n        vv = 89;\n    }\n\n    cout &lt;&lt; setw(2) &lt;&lt; setfill('0') &lt;&lt; vv &lt;&lt; endl;\n    return 0;\n}<\/code><\/pre><\/section>\n\n\n\n<p class=\"wp-block-paragraph\">\u3082\u3046\u4e00\u3064\u306e\u66f8\u304d\u65b9\u3068\u3057\u3066\u3001\u4e09\u9805\u6f14\u7b97\u5b50\uff08?:\uff09\u3092\u4f7f\u3063\u3066\u6761\u4ef6\u5206\u5c90\u3092\u30b9\u30c3\u30ad\u30ea\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading jinr-heading d--bold\">\u4e09\u9805\u6f14\u7b97\u5b50\uff08?:\uff09\u306e\u57fa\u672c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u300c<strong>\u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024<\/strong>\u300d\u3068\u3044\u3046\u5f62\u3092\u3068\u308a\u307e\u3059\u3002if-else\u6587\u30921\u884c\u3067\u66f8\u3051\u308b\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u66f8\u304d\u65b9\u3067\u3059\u3002<\/p>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"cfedfb4d-7500-4dc1-8ab4-41d813d06b96\"><pre class=\"language-cpp line-numbers\"><code>\u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024\n\n\/\/ \u57fa\u672c\u5f62\n\u6761\u4ef6\u5f0f ? \u771f\u306e\u5834\u5408\u306e\u5024 : \u507d\u306e\u5834\u5408\u306e\u5024\n\n\/\/ \u4f8b\nint x = (a &lt; b) ? a : b; <\/code><\/pre><\/section>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u56de\u306e\u6761\u4ef6\u3067\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u307f\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059<\/p>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"ff40c57e-ac28-408a-a7c2-66921cfafda1\"><pre class=\"language-cpp line-numbers\"><code>int vv =\n        m &lt; 100 ? 0 :\n        m &lt;= 5000 ? m \/ 100 :\n        m &lt;= 30000 ? m \/ 1000 + 50 :\n        m &lt;= 70000 ? (m \/ 1000 - 30) \/ 5 + 80 : 89;<\/code><\/pre><\/section>\n\n\n\n<ol class=\"wp-block-list jinr-list\">\n<li><code>m &lt; 100<\/code> \u2192 true \u2192 <code>0<\/code>\u3092\u4ee3\u5165\u3057\u3066\u7d42\u4e86<\/li>\n\n\n\n<li>2.\u30c0\u30e1\u306a\u3089 <code>m &lt;= 5000<\/code> \u2192 true \u2192 <code>m \/ 100<\/code>\u3092\u4ee3\u5165\u3057\u3066\u7d42\u4e86<\/li>\n\n\n\n<li>3.\u30c0\u30e1\u306a\u3089 <code>m &lt;= 30000<\/code> \u2192 true \u2192 <code>m \/ 1000 + 50<\/code>\u3092\u4ee3\u5165\u3057\u3066\u7d42\u4e86<\/li>\n\n\n\n<li>4.\u30c0\u30e1\u306a\u3089 <code>m &lt;= 70000<\/code> \u2192 true \u2192 <code>(m \/ 1000 - 30) \/ 5 + 80<\/code>\u3092\u4ee3\u5165\u3057\u3066\u7d42\u4e86<\/li>\n\n\n\n<li>5.\u5168\u90e8\u30c0\u30e1\u306a\u3089 <code>89<\/code>\u3092\u4ee3\u5165<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u7c21\u6f54\u306b\u66f8\u3051\u307e\u3059\u304c\u3001\u6761\u4ef6\u3092\u9593\u9055\u3048\u3084\u3059\u3044\u6b20\u70b9\u3082\u3042\u308a\u307e\u3059\u3002<br>\u6163\u308c\u306a\u3044\u3046\u3061\u306fif-else\u3067\u66f8\u304d\u3001\u30b3\u30fc\u30c9\u306b\u6163\u308c\u3066\u304d\u305f\u3089\u4e09\u9805\u6f14\u7b97\u5b50\u3082\u4f7f\u3063\u3066\u307f\u308b\u306e\u304c\u304a\u52e7\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c\u306b\u4eca\u56de\u306e\u554f\u984c\u306e\u51fa\u529b\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"9ca5f384-ad7c-4fe4-b684-8e1c88e8be25\"><pre class=\"language-cpp line-numbers\"><code>cout &lt;&lt; setw(2) &lt;&lt; setfill('0') &lt;&lt; vv &lt;&lt; endl;<\/code><\/pre><\/section>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e1\u884c\u3067\u300cVV\u306e\u5024\u30922\u6841\u306e\u30bc\u30ed\u57cb\u3081\u4ed8\u304d\u3067\u51fa\u529b\u3057\u3001\u6539\u884c\u3059\u308b\u300d\u3068\u3044\u3046\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u554f\u984c\u6587\u3067\u300cVV\u306f\u5fc5\u305a\uff08\u4e0a\u4f4d\u306e 0 \u3092\u542b\u3081\u3066\uff092\u6841\u306e\u6574\u6570\u300d\u3068\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001<code>02<\/code> \u306e\u3088\u3046\u306b1\u6841\u306e\u5024\u306b\u306f\u5148\u982d\u306b <code>0<\/code> \u3092\u4ed8\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading jinr-heading d--bold\">\u5404\u90e8\u5206\u306e\u5f79\u5272<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>setw<\/code> \u3068 <code>setfill<\/code> \u3092\u4f7f\u3046\u306b\u306f <code>&lt;iomanip&gt;<\/code> \u306e\u30a4\u30f3\u30af\u30eb\u30fc\u30c9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<section class=\"wp-block-jinr-blocks-syntax-hl b--jinr-block b--jinr-highlighter d--highlighter-height-auto t--round\" data-block-id=\"4c203325-7700-4754-994b-d49b2d4a0616\"><pre class=\"language-cpp line-numbers\"><code>#include &lt;iomanip><\/code><\/pre><\/section>\n\n\n\n<p class=\"wp-block-paragraph\">\u203biomanip \u306f <strong>io<\/strong>\uff08I\/O\uff1d\u5165\u51fa\u529b\uff09+ <strong>manip<\/strong>\uff08manipulator\uff1d\u64cd\u4f5c\u5b50\uff09\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u3001\u300c\u5165\u51fa\u529b\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306e\u30d8\u30c3\u30c0\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u884c\u305a\u3064\u5206\u89e3\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u90e8\u5206<\/th><th>\u5f79\u5272<\/th><th>\u8a73\u7d30<\/th><\/tr><\/thead><tbody><tr><td><code>cout<\/code><\/td><td>\u6a19\u6e96\u51fa\u529b<\/td><td>\u753b\u9762\u3078\u306e\u51fa\u529b\u3092\u884c\u3046<\/td><\/tr><tr><td><code>setw(2)<\/code><\/td><td>\u51fa\u529b\u5e45\u30922\u306b\u6307\u5b9a<\/td><td>\u6b21\u306b\u51fa\u529b\u3059\u308b\u5024\u3092\u6700\u4f4e2\u6841\u3067\u8868\u793a\u3059\u308b(\u203bset width)<\/td><\/tr><tr><td><code>setfill('0')<\/code><\/td><td>\u30bc\u30ed\u57cb\u3081<\/td><td>\u6841\u304c\u8db3\u308a\u306a\u3044\u90e8\u5206\u3092 <code>0<\/code> \u3067\u57cb\u3081\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><code>setw(2)<\/code> \u3060\u3051\u3060\u3068\u7a7a\u767d\u57cb\u3081\uff08 <code>2<\/code>\uff09\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3001<code>setfill('0')<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u30bc\u30ed\u57cb\u3081\uff08<code>02<\/code>\uff09\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading jinr-heading d--bold\">\u30b7\u30e7\u30fc\u30c8\u52d5\u753b<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u65e5\u306e\u554f\u984c \u4eca\u56de\u306fAtCoder Beginner Contest 001\u306eB\u554f\u984c\u8996\u7a0b\u306e\u901a\u5831\u3092\u89e3\u3044\u3066\u3044\u304d\u307e\u3059\u3002 \u203bYouTube\u306b\u89e3\u8aac\u52d5\u753b\u3042\u308a\u307e\u3059\u3002 \u554f\u984c\u6587\u3092\u8981\u7d04\u3059\u308b\u3068\u3001\u8996\u7a0b\uff08\u8089\u773c\u3067\u7269\u4f53\u304c\u306f\u3063\u304d\u308a\u3068\u78ba\u8a8d\u3067\u304d\u308b\u6700\u5927\u306e\u8ddd\u96e2\uff09 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